Perforating device



New. 15, 1927. 1,649,635

L. J. WILLARD PERFORATING DEVICE Filed Auz. 28, 1925 FIG-.42

Patented Nov. 15, 1927.

UNITED STATES PATENT orsrcrz.

LOUIS J. WILLARID, 0F NORWALK, OHIO, ASSIGN'OR- TO THE ROTARY PRINTINGCOM- ?ANY, OF NORWALK, OHIO, A GORPQRA'I'ION OF OHTQ.

PERFORATING DEVICE.

Application filed August 28, 1925. Serial No. 52,994.

This invention relates to sheet perforating mechanism particularlyadapted to paper sheets, and the primary object is to provide amechanism adapted to operate on a moving sheet or strip of paper forexample as fed from a web printing ress, and effectively perforate suchsheet.

Another object is to provide a simple effective perforating apparatuswhich may be mounted in a convenient manner in a pair of rolls capableof feeding the sheet and place the perforations in predetermined.positions on the sheet.

A further specific object is to provide a simple device for arranging aplurality of perforating devices in a pair ofcoacting rolls in such amanner that their relative position on the respective rolls may beeasily changed.

I have discovered that I can accomplish the desired result by mountingina pair of coasting rolls capable of feeding paper sheets, a pair ofelements comprising simply a hollow die carried by one of thejrolls anda spherical die member resiliently carried by the other roll and adaptedto register with the hollow die. I find that the same spherical membermay be used with hollow dies of various sizes. j

Further features of the invention will appear in the following;description which relates to the accompanying drawing. The essentialnovel characteristics will be summarized in the claims.

In the drawings, Fig. 1 is a perspective view of a pair of coactinzrolls in which my invention is embodied; Fig. 2 is a cross sectionthrough a single perforating unit; Fig. 3 is a perspective view of apreferred form of female die; Fig. 4 is a perspective view of a sheet asperforated by the arrangement shown in Fig. 1.

In the embodiment shown, the mechanism is arranged to perforate sheetsor a web of fed paper with a series of aligned holes. such as commonlyused for loose-leaf binder sheets.

Referring in detail to the drawings and indicating the various parts bysuitable charactcrs, the male die elements, including the respectiveholders therefor, are indicated generally at 1 and the female dieelements a152, each set being suitably mounted in respective rolls R andB. Each maledie element as shown in Fig. 2 comprises aspherical punch orperforator, preferably a metal ball 3 which may be mounted in acylindri- 6 bearing against a washer 7 having a, congail le lowersurface adapted to engage the a a 1 Suitable means for adjusting theaction of the spring may comprise a threaded plug 8 bearing downwardlyupon. the upper end ofthe spring; as shown and threaded into the shell.The shell as shown is threaded externally throughout the greater part ofits length as at 10 into a block ll which block may be made with adove-tail shank adapted to enter T-slots 18 which I have shownconveniently arranged in the body of each of the rolls. Any suitablemeans may be pro vided for holding the shell in adjusted position sothat the ball is maintained in proper,

relation to the peripheral surface of its roll, such for instance, as aset-screw 15in the body of the block 11. p i

The female dies comprise essentially members such as indicated. at 20each having a circular cutting edge as shown at 21.. Each die 20 asshown has a central longitudinal flaring opening; 22 which widens"toward the axis of the roll upon which it is mounted in order toprovide for the easy discharge of scrap paper therethrouggh into theinterior of the roll.

The female die may be held in a manner similar to that of the shell 4.namely by means of being threaded as at 24 into a block 25 where it maybe held hv a set-screw 15. Any suitable means may be provided effectinglongitudinal adjustment of both the shell eland die 20, such forinstance. as screwdriver slots 26 and 27 in the shell and dierespectively.

The block 11 and 25 may be slidably mounted in T-slots as shown in Fig.1 and metal inserts such as indicated at 28 may serve to position theblocks. longer or short" er inserts being; employed where it is desiredto vary the distance between the perforations inthe paper. Suitablemeans may be provided to prevent the blocks and inserts from shiftinglengthwise of the rolls. I have shown, for instance, a split block 30mounted in the groove. and expandable by means of a screw 31 passinginto a tapered thread in theblock.

I have found that when such an arrangement is mounted as just described,in suitable rolls, that a single set of balls may be employed with anumber of female dies each of which has a cutting edge of differentdiameter, it being simply necessary to adjust the ball or die up or downas required in such amanner that the ball seats firmly against the edgesof the die when paper is fed therebetween.

It will be seen that when a web or sheet of paper such as indicated at Sis being fed,

as from a printing press, into the bite of the rolls R and R, the paperas it passes between the balls and dies will be cut by the engagingsurfaces thereof to form lines of perfo'ations such as shown at P inFig. 4.

I have found that with the hollow dies and the cooperating springpressed balls as herein explained, I obtain very effective per forationsnotwithstanding the paper travels at a high speed between the rolls. Theperforations are accurately made, and there is no tendency to tear ormar the paper. Various sizes of hollow dies will cooperatesatisfactorily with the same balls. As illustrated in the drawings, theperforating devices may be grouped on the rolls in any arrangementdesired. It should be understood however, that I do not limit myself toany particular arrangement for mounting the die elements in the rolls.

Having thus described my invention, I claim i H a 1. The combination ofa pair of rolls each equipped with undercut grooves in its surface,blocks adjustably mounted in said grooves to occupy various positions inthe rolls, hollow dies mounted in the blocks of one roll in a mannerto-enable them to be adjusted radially, and resiliently supported hollowspherical punches mounted in the blocks of the other roll andadjnstableradially therein.

2. In combination with a pair of coacting rolls, a die having an abruptcircular cutting edge arranged to be carried by one of the rolls, a diehaving a spherical cutting surface resiliently mounted and arranged tobe carried by the other roll, each of said dies having a screw threadedmounting in its roll whereby there is provided means for positioningeach of said dies on their respective rolls at various positionsrelative to the peripheral surface of such rolls and in registrationwith each other.

3. In eombinatioma female die having a circular cutting edge, means formounting" the die, means whereby the die may be turned to adjust it andmeans for holding the die in adjusted position, a spherical die memberarranged to register with the said cutting edge, means including athreaded sleeve for supporting the spherical die member, and means forturning the sleeve to effeet adjustment thereof relative to the femaledie. i

t. The combination of a pair of rolls each having a plurality oflongitudinal grooves in its surface blocks adjustably positioned in therespectlve grooves, hollow dies screw threaded radially in the blocks inone roll,

hollow casings screw threaded radiallyin the blocks of the other roll, aball in each casing and a spring in each casing pressing i the balloutwardly.

In testimony whereof, I hereunto affix my signature.

LOUIS J. WILLARD.

